@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg:        #F7F7F8;
  --surface:   #FFFFFF;
  --surface-2: #F3F4F6;
  --primary:   #1E40AF;
  --primary-h: #1D3A9A;
  --accent:    #0E7490;
  --text:      #0F172A;
  --text-2:    #64748B;
  --text-3:    #94A3B8;
  --border:    #E5E7EB;
  --green:     #059669;
  --red:       #DC2626;
  --star:      #D97706;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 4px 12px rgba(0,0,0,.04);
  --shadow:    0 4px 16px rgba(0,0,0,.09), 0 8px 28px rgba(0,0,0,.05);
  --radius:    14px;
  --radius-sm: 8px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ─── Container ─── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Navigation ─── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 247, 248, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
  white-space: nowrap;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: var(--primary);
  border-radius: 7px;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  transition: all .2s;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--surface);
  color: var(--text);
}

.nav-links a.active {
  box-shadow: var(--shadow-sm);
}

.nav-cta {
  flex-shrink: 0;
}

.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: background .2s, transform .15s;
}

.btn-sm:hover { background: var(--primary-h); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 16px;
  color: var(--text);
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .2s;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-h); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(30,64,175,.25); }

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: #EFF6FF; transform: translateY(-2px); }

.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover { background: #0C6880; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(14,116,144,.25); }

/* ─── Hero ─── */
.hero {
  position: relative;
  padding: 80px 0 70px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, #D1D5DB 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: .45;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: #DBEAFE;
  color: var(--primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid #BFDBFE;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(1.3); }
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero h1 span {
  color: var(--primary);
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-2);
  max-width: 520px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-stats {
  margin-top: 56px;
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 12px;
  color: var(--text-2);
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
}

/* ─── Section ─── */
.section {
  padding: 64px 0;
}

.section-header {
  margin-bottom: 36px;
}

.section-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 8px;
}

.section-header h2 {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.section-header p {
  color: var(--text-2);
  margin-top: 8px;
  max-width: 500px;
}

/* ─── Category Cards ─── */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow .25s, transform .25s;
}

.category-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.category-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}

.category-icon.blue { background: #DBEAFE; }
.category-icon.teal { background: #CCFBF1; }

.category-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.category-card p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
}

/* ─── Provider / Review Card ─── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.provider-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: box-shadow .25s, transform .25s;
}

.provider-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.provider-logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -1px;
  flex-shrink: 0;
}

.card-rating {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.stars {
  color: var(--star);
  font-size: 13px;
  letter-spacing: 1px;
}

.rating-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}

.card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.card-desc {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.tag-blue  { background: #EFF6FF; color: #1D4ED8; border: 1px solid #BFDBFE; }
.tag-teal  { background: #F0FDFA; color: #0E7490; border: 1px solid #A5F3FC; }
.tag-amber { background: #FFFBEB; color: #B45309; border: 1px solid #FDE68A; }
.tag-gray  { background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border); }
.tag-green { background: #F0FDF4; color: #059669; border: 1px solid #A7F3D0; }

.card-specs {
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.spec-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.spec-label {
  font-size: 11px;
  color: var(--text-3);
  font-weight: 500;
}

.spec-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  font-family: 'SF Mono', 'Consolas', monospace;
}

.card-pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.pros, .cons {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pros-title, .cons-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 4px;
}

.pros-title { color: var(--green); }
.cons-title { color: var(--red); }

.pros li, .cons li {
  font-size: 12px;
  color: var(--text-2);
  padding-left: 14px;
  position: relative;
  line-height: 1.5;
}

.pros li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
  font-size: 11px;
}

.cons li::before {
  content: '✗';
  position: absolute;
  left: 0;
  color: var(--red);
  font-weight: 700;
  font-size: 11px;
}

.card-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-num {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.price-period {
  font-size: 12px;
  color: var(--text-2);
}

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
}

.card-foot .btn {
  flex: 1;
  padding: 9px 14px;
  font-size: 13px;
}

/* ─── Filters / Tabs ─── */
.filter-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  transition: all .2s;
}

.filter-tab:hover { border-color: var(--primary); color: var(--primary); }
.filter-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ─── Page Header ─── */
.page-header {
  padding: 52px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 52px;
}

.page-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.4px;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-2);
  font-size: .97rem;
  max-width: 560px;
}

/* ─── Recommend Cards ─── */
.rec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.rec-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .25s, transform .25s;
}

.rec-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.rec-card-top {
  padding: 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 14px;
}

.rec-logo {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -1px;
  flex-shrink: 0;
}

.rec-card-top-info h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.rec-card-body {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}

.rec-highlights {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rec-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--text-2);
}

.rec-highlight-item::before {
  content: '→';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0;
}

.rec-notice {
  font-size: 12px;
  color: var(--text-3);
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  border-left: 3px solid var(--accent);
  line-height: 1.5;
}

.rec-card-foot {
  padding: 16px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rec-card-foot .btn {
  width: 100%;
}

.rec-price-note {
  text-align: center;
  font-size: 11px;
  color: var(--text-3);
}

/* ─── Notice Box ─── */
.notice-box {
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 40px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.notice-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }

.notice-text {
  font-size: 13px;
  color: #1E40AF;
  line-height: 1.6;
}

.notice-text strong { font-weight: 700; }

/* ─── Footer ─── */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 40px 0 28px;
  margin-top: 80px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-2);
  margin-top: 10px;
  max-width: 280px;
  line-height: 1.65;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  font-size: 13px;
  color: var(--text-2);
  transition: color .15s;
}

.footer-col a:hover { color: var(--primary); }

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 12px;
  color: var(--text-3);
}

.footer-aff-notice {
  font-size: 11px;
  color: var(--text-3);
  background: var(--surface-2);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

/* ─── Divider ─── */
.divider { border: none; border-top: 1px solid var(--border); }

/* ─── Responsive ─── */
@media (max-width: 700px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 61px;
    left: 0;
    right: 0;
    background: var(--bg);
    padding: 12px 16px 16px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
  }
  .nav-links.open + .nav-cta { display: flex; }
  .hero { padding: 48px 0 40px; }
  .hero-stats { gap: 24px; }
  .stat-divider { display: none; }
  .card-pros-cons { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}